package org.arch_learn.netty_rpc.provider.netty_server;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;
import org.arch_learn.netty_rpc.provider.handler.NettyRpcServerHandler;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class NettyRpcServer implements DisposableBean {
    private NioEventLoopGroup bossGroup;
    private NioEventLoopGroup workerGroup;

    @Autowired
    private NettyRpcServerHandler nettyRpcServerHandler;

    public void startServer(String ip, Integer port) {
        try {
            //1.创建线程组
            bossGroup = new NioEventLoopGroup(1);
            workerGroup = new NioEventLoopGroup();
            //2.创建服务端启动助手
            ServerBootstrap serverBootstrap = new ServerBootstrap();
            //3.设置启动参数
            serverBootstrap.group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel socketChannel) throws Exception {
                            ChannelPipeline pipeline = socketChannel.pipeline();
                            //添加String的编解码器
                            pipeline.addLast(new StringDecoder());
                            pipeline.addLast(new StringEncoder());
                            //添加业务处理类
                            pipeline.addLast(nettyRpcServerHandler);
                        }
                    });
            //4.绑定端口
            ChannelFuture channelFuture = serverBootstrap.bind(ip, port).sync();
            System.out.println("netty服务端启动成功！");
            channelFuture.channel().closeFuture().sync();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
//        finally {
//            if (bossGroup != null) {
//                bossGroup.shutdownGracefully();
//            }
//
//            if (workerGroup != null) {
//                workerGroup.shutdownGracefully();
//            }
//        }
    }

    @Override
    public void destroy() throws Exception {
        if (bossGroup != null) {
            bossGroup.shutdownGracefully();
        }

        if (workerGroup != null) {
            workerGroup.shutdownGracefully();
        }
    }
}
